Folding trestle



May 14, 1929. J.- D. THOMAS ET AL 3 FOLDI NG TRESTLE Filed Feb. 15. 19282 Sheets-Sheet l Inventor;

cI jlf/iozzzas, cf. 2 flolezow,

Attornqy Patented May 14, 1929.

UNITED STATES PATENT OFFICE.)

JOHN D. THOMAS AND JOHN E. HOL'ETON, OF NORTH ENGLISH, IOWA.

FOLDING 'rnnsrnn.

Application filed February 13, 1928. ScrialNo. 254,000.

This invention relates to new and useful improvements in foldingtrestles and aims to provide a trestle structure that can be qulckly andeasily folded into compact form so that it may be readily transportedfrom place to place.

In the drawings wherein lil re reference characters indicatecorrespondlg parts throughout the several views Figure 1 is a sideelevation of our folding trestle, the legs and supporting bracestherefor at one end of the trestledisclosed in full and dotted lineposition.

Figure 2 is an end elevation of the trestle when in set up position.

Figure 3 is a' bottom plan view of the trestle when completelycollapsed.

Figure 4 is a side elevation of the trestle when in collapsed condition.

Figure 5 is a transverse cross section taken substantially upon the line5-5 of Figure 4.

Figure 6 is an end elevation of the trestlein collapsed condition, and

Figure 7 isa fragmentary vertical section through one end of the trestlelooking toward the adjacent leg structure when in set up condition.

Now having particular reference to the drawings our novel trestleconsists of a' somewhat narrow board 5 of predetermined length to thebottom of which is secured longitudi nally a channel bar 6 of relativelywide in verted U-formation in cross section as clearly disclosed inFigure 7 Arranged transversely through the side wall of this channel baradjacent opposite ends thereof are cross pins Pivoted to each cross pin7 is a pair of complemental end legs 88 of L-bar construction.- Theloose-connection of the legs to the pin permits the legs to be separatedafter being swung downwardly into the full line posi-- tion disclosed inFigures 1 and 2. The edges of the adjacent walls of the legs at theirupper ends are beveled so that they will have flush engagement with eachother when the legs are converged outwardly as disclosed in Figures 2and 7 Furthermore, in order to prevent wobbling of the legs upon theirpivots there is arranged upon the respective pin 7 between the legs, aspacing collar 9.

In order to retain the legs in converging relation, said legs areinterconnected inter.- mediate their ends by toggle levers 101Qpivotally interconnected at their adjacent ends as at 11.

Furthermore, the said legs 88 are connected to the adjacent side wallsof the channel bar 6 by elongated toggle levers 1212 which are pivotedat their outer ends to the legs and to the channel bar respectively, theinner ends thereof being pivotally interconnected as at 18, theconnections between the toggle levers lO-1O and 1212 being of theconventional break joint disclosed.

Obviously after the joints of the levers- 1010 and 1212 have been brokenthe legs 8-8 may be swung into engagementwith each other and thencefolded inwardly into position Within the channel bar 6 at the under sideof the board 5.

Pivoted to the lower end of a pin 14 depending from the main wall of thechannel bar 6 intermediate the ends thereof is a'latch plate 15, theends of which will engage over the adjacent endsof the pairs of legs 88after the .same have been swung into the channel bar 6 to prevent theoutward swing- 1iang of the legs with respect to said channel It willthus be seen that we have provided a highly novel, simple, and extremelyuseful and eflicient folding trestle that is well adapted for all thepurposes heretofore designated, even though we have herein shown andclescribed the invention as consisting of certain detail structuralelements it is nevertheless to be understood that some changes may bemade therein without affecting the spirit and scope of the appendedclaim.

Having thusdescribed the invention, what we claim as new and desire tosecure by Le ters Patent is In a folding trestle of the characterdescribed, an elongated board member, a U- shaped channel bar arrangedinverted position upon thebottom of said board, cross pins at theopposite ends of said channel bar, a pair of leg members loosely pivotedat their upper ends to each cross pin and adapted to l vers pivoted attheir opposite ends to the between said legs for preventing the Weblegsand, to the adjacent side Wall of the chanbling of the legs upon theirpins.

nel bar for maintaining the legs in perpendic In testimony whereof weaffix our signa- 10 ular position when the same are swung into tnres. 5right angular position with respect to-said channel bar, and a spacingcollar loose upon JOHN D. THOMAS. each pin at the ends ofthe channel barand JOHN E. HOLETON.

